Choyamba, mfundo zofunika ndi ntchito zosiyanasiyana mpweya structural steelCarbon structural zitsulo amatanthauza zipangizo zitsulo ndi okhutira mpweya zosaposa 2.11%, amene chimagwiritsidwa ntchito kupanga, kumanga, zitsulo, shipbuilding, makina kupanga, mafuta ndi mankhwala i. ..
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